release/5.2.29/can-kvaser_usb-kvaser_usb_leaf-Fix-some-info-leaks-t.patch

From 1da6d7af58b3e3f44f27d5cbec0ca14332a40468 Mon Sep 17 00:00:00 2001
From: Xiaolong Huang <butterflyhuangxx@gmail.com>
Date: Sat, 7 Dec 2019 22:40:24 +0800
Subject: [PATCH] can: kvaser_usb: kvaser_usb_leaf: Fix some info-leaks to USB
 devices

commit da2311a6385c3b499da2ed5d9be59ce331fa93e9 upstream.

Uninitialized Kernel memory can leak to USB devices.

Fix this by using kzalloc() instead of kmalloc().

Signed-off-by: Xiaolong Huang <butterflyhuangxx@gmail.com>
Fixes: 7259124eac7d ("can: kvaser_usb: Split driver into kvaser_usb_core.c and kvaser_usb_leaf.c")
Cc: linux-stable <stable@vger.kernel.org> # >= v4.19
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
index 07d2f3aa2c02..ae4c37e1bb75 100644
--- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
+++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
@@ -608,7 +608,7 @@ static int kvaser_usb_leaf_simple_cmd_async(struct kvaser_usb_net_priv *priv,
 	struct kvaser_cmd *cmd;
 	int err;
 
-	cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
+	cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
 	if (!cmd)
 		return -ENOMEM;
 
@@ -1140,7 +1140,7 @@ static int kvaser_usb_leaf_set_opt_mode(const struct kvaser_usb_net_priv *priv)
 	struct kvaser_cmd *cmd;
 	int rc;
 
-	cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 	if (!cmd)
 		return -ENOMEM;
 
@@ -1206,7 +1206,7 @@ static int kvaser_usb_leaf_flush_queue(struct kvaser_usb_net_priv *priv)
 	struct kvaser_cmd *cmd;
 	int rc;
 
-	cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 	if (!cmd)
 		return -ENOMEM;
 
-- 
2.7.4